package com.szosen.web;

import java.io.BufferedReader;

import java.io.ByteArrayOutputStream;
import java.io.DataOutputStream;
import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.net.HttpURLConnection;
import java.net.URL;
import android.app.Activity;
import android.content.Context;
import android.content.Intent;
import android.net.Uri;
import android.util.Log;

import com.szosen.util.FileSaveUtil;

/***
 * 更新工具
 * 
 * @author geshenjibi
 * 
 */
public class UpdateTool {
	private static final String updateMessageUrl = "http://www.szosen.com/upload/app_update/updatemessage.txt";
	private static final String updateXiaweijiMessageUrl = "http://www.szosen.com/upload/app_update/updatemonitor.txt";

	public static void openFile(File file, Context context) {
		Intent intent = new Intent();
		intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
		intent.setAction(android.content.Intent.ACTION_VIEW);
		intent.setDataAndType(Uri.fromFile(file),
				"application/vnd.android.package-archive");
		context.startActivity(intent);
	}

	/***
	 * 通过浏览器打开url
	 */
	public static void openURlByBrower(Activity activity, String url) {
		Intent intent = new Intent();
		intent.setAction("android.intent.action.VIEW");
		Uri content_url = Uri.parse(url);
		intent.setData(content_url);
		activity.startActivity(intent);
	}

	/***
	 * 
	 * 获取服务器读取到的txt文件文本
	 * 
	 * @return
	 */
	public static File getUpdateMessage() {
		// StringBuffer sb = post(updateMessageUrl);
		try {
			return downLoadFromUrl(updateMessageUrl, "updateMessage.txt",
					FileSaveUtil.getSDCardPath());
		} catch (IOException e) {
			e.printStackTrace();
			return null;
		}
		// return sb.toString();
	}

	/***
	 * 
	 * 获取服务器读取到的txt文件文本
	 * 
	 * @return
	 */
	public static File getUpdateXiaweijiMessage() {
		// StringBuffer sb = post(updateMessageUrl);
		try {
			return downLoadFromUrl(updateXiaweijiMessageUrl,
					"updateXiaweijiMessage.txt", FileSaveUtil.getSDCardPath());
		} catch (IOException e) {
			e.printStackTrace();
			return null;
		}
		// return sb.toString();
	}

	/**
	 * 从网络Url中下载文件
	 * 
	 * @param urlStr
	 * @param fileName
	 * @param savePath
	 * @throws IOException
	 */
	public static File downLoadFromUrl(String urlStr, String fileName,
			String savePath) throws IOException {
		URL url = new URL(urlStr);
		HttpURLConnection conn = (HttpURLConnection) url.openConnection();
		// 设置超时间为3秒
		conn.setConnectTimeout(3 * 1000);
		// 防止屏蔽程序抓取而返回403错误
		conn.setRequestProperty("User-Agent",
				"Mozilla/4.0 (compatible; MSIE 5.0; Windows NT; DigExt)");
		// 得到输入流
		InputStream inputStream = conn.getInputStream();
		if(inputStream==null){
			return null;
		}
		// 获取自己数组
		byte[] getData = readInputStream(inputStream);
		// 文件保存位置
		File saveDir = new File(savePath);
		if (!saveDir.exists()) {
			saveDir.mkdir();
		}
		File file = new File(saveDir + File.separator + fileName);
		FileOutputStream fos = new FileOutputStream(file);
		fos.write(getData);
		if (fos != null) {
			fos.close();
		}
		if (inputStream != null) {
			inputStream.close();
		}
//		System.out.println("info:" + url + " download success下载成功");
		return file;
	}

	/**
	 * 从输入流中获取字节数组
	 * 
	 * @param inputStream
	 * @return
	 * @throws IOException
	 */
	public static byte[] readInputStream(InputStream inputStream)
			throws IOException {
		byte[] buffer = new byte[1024];
		int len = 0;
		ByteArrayOutputStream bos = new ByteArrayOutputStream();
		while ((len = inputStream.read(buffer)) != -1) {
			bos.write(buffer, 0, len);
		}
		bos.close();
		return bos.toByteArray();
	}


}
